BIO 240 1.2 D
"Action Potential Reaches the Synaptic Nob" Is Synaptic transmission step ____.
1
"Voltage Gated Calcium Channels Open" Is Synaptic transmission step ____.
2
"Calcium Enters the Synaptic Knob" Is Synaptic transmission step ____.
3
"Calcium triggers exocytosis of Vesicles" Is Synaptic transmission step ____.
4
"The neurotransmitter diffuses across the synaptic cleft" Is Synaptic transmission step ____.
5
"The neurotransmitter binds to postsynaptic receptors" Is Synaptic transmission step ____.
6
The myelin sheath covers the ____.
Axon
The myelin sheath is made up of a high percentage of _______?
Lipids
The picture depicts the process of myelination in the ________ nervous system.
Peripheral
Neurofibril nodes are also called nodes of _____.
Ranvier
Before a vesicle of neurotransmitter can be released which of the following must occur? a)voltage-gated calcium channel open b)alcium must flow out of the synaptic knob c)calcium must travel across the synaptic cleft d)action potential reaches synaptic knob
a,c
The nerve impulse causes ______ in the number of calcium ions that enter the synaptic knob.
an increase
The presence of ______ ions causes the synaptic vesicles to bind to the membrane, allowing neurotransmitters to be released.
calcium
A myelinated axon has a ______ conduction velocity than an unmyelinated axon.
faster
It usually takes ______ neurolemmocyte(s) to myelinate one axon.
many
A(n) ______ is much more efficient because saltatory conduction occurs and less energy is required to maintain the RMP.
myelinated axon
The thin outer layer of the neurolemmocyte is called the ________.
neurilemma
The small spaces that interrupt the myelin sheath are called ______.
neurofibril nodes
In this figure showing the process of myelination, a(n) ______ is represented by the letter A.
neurolemmocyte
A toxin that interferes with the activity of neurons is called a
neurotoxin
Interfere with the transmission of action potentials correct Induce detrimental structural change to a neuron incorrect Alter events that occur at a synapse are examples of mechanism by which _________ may do ______.
neurotoxins, harm